| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 3387 |
16%
|
| 2 | Weekly | 895 |
4.2%
|
| 3 | Monthly | 276 |
1.3%
|
| 4 | Yearly | 96 |
0.5%
|
| 5 | Not at all | 16532 |
78%
|
| Sysmiss | 3974 |